42185471 has 2 divisors, whose sum is σ = 42185472. Its totient is φ = 42185470.

The previous prime is 42185419. The next prime is 42185501. The reversal of 42185471 is 17458124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42185471 - 2²² = 37991167 is a prime.

It is a super-3 number, since 3×42185471³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42185371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21092735 + 21092736.

It is an arithmetic number, because the mean of its divisors is an integer number (21092736).

Almost surely, 2^42185471 is an apocalyptic number.

42185471 is a deficient number, since it is larger than the sum of its proper divisors (1).

42185471 is an equidigital number, since it uses as much as digits as its factorization.

42185471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 42185471 is about 6495.0343340124. The cubic root of 42185471 is about 348.1135815226.

The spelling of 42185471 in words is "forty-two million, one hundred eighty-five thousand, four hundred seventy-one".